Ch 16 Vocab

Question 0

Gene pool

Answer 0

A term used to describe the total genetic information available in a population

Question 1

Population genetics

Answer 1

The study of evolution from a genetic point of view

Question 2

Hardy-Weinberg genetic equilibrium

Answer 2

The principle that genotype frequencies in a population tend to remain the same from generation to generation unless acted on by outside influences

Question 3

Immigration

Answer 3

The movement of individuals into a population

Question 4

Emigration

Answer 4

The movement of individuals out of a population

Question 5

Gene flow

Answer 5

The process of genes moving from one population to another

Question 6

Genetic drift

Answer 6

The phenomenon by which allele frequencies in a population changes as a result of random events, or chance

Question 7

Sexual selection

Answer 7

The tendency that females will choose the males they mate with based on certain traits

Question 8

Disruptive selection

Answer 8

Individuals with either extreme variation of a trait have greater fitness that individuals with the average form of the trait

Question 9

Stabilizing selection

Answer 9

Individuals with the average form of a trait have the highest fitness

Question 10

Directional selection

Answer 10

Individuals that display a more extreme form of a trait have greater fitness than individuals with an average form of the trait

Question 11

Speciation

Answer 11

The process of species formation

Question 12

Morphology

Answer 12

The internal and external structure and appearance of an organism

Question 13

Biological species concept

Answer 13

A species is a population of organisms that can successfully interbreed but cannot breed with other groups

Question 14

Geographic isolation

Answer 14

The physical separation of members of a population

Question 15

Allopathic speciation

Answer 15

Happens when species arise as a result of geographic isolation

Question 16

Reproductive isolation

Answer 16

Results from barriers to successful breeding between population groups in the same area

Question 17

Prezygotic isolation

Answer 17

Or premating isolation occurs before fertilization

Question 18

Postzygotic isolation

Answer 18

Or postmating isolation occurs after fertilization

Question 19

Sympatric speciation

Answer 19

Occurs when two sub populations become reproductively isolated within the same geographic area